#include "getch.h"
#include <stdio.h>

#define BUFSIZE 100

static char buf[BUFSIZE];
static int bufp = 0;

int getch(void)
{
	return (bufp > 0) ? buf[--bufp] : getchar();
}

void ungetch(int c)
{
	if(bufp >= BUFSIZE)
		printf("ungetch: too many characters\n");
	else
		buf[bufp++] = c;
}

int Getline(char s[], int lim)
{
	int c, i;
	
	i = 0;
	while(--lim > 0 && (c = getchar()) != EOF && c != '\n')
		s[i++] = c;
	if(c == '\n')
		s[i++] = c;
	s[i] = '\0';
	return i;
}


